Huawei NetEngine80E Configuration Manual - Reliability page 208

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Table of Contents

HUAWEI NetEngine80E/40E Router

Configuration Guide - Reliability

Figure 4-19 Networking diagram for connecting VRRP backup groups to an L3VPN

core network

Issue 02 (2014-09-30)

Set the interval for the peer BFD detection between the NPEs to 30 ms, the link BFD

detection between an NPE and a UPE to 10 ms. Peer BFD is used to perform the master/

backup VRRP switchover, and link BFD is used to monitor a link. Peer BFD and link BFD

are used together to perform the fast master/backup switchover of NPEs.

l When the master NPE restarts or the master link BFD reports a fault, the backup NPE receives the fault

notification from peer BFD and therefore starts to check the status of the backup link BFD. If the backup

link BFD is Up, the backup NPE becomes the master and advertises routes to the remote PE. In addition,

the backup NPE sends gratuitous ARPs to the UPE to clear the MAC address table of VPLS on the

UPE. At this time, the previous master NPE cancels the advertisement of routes to the remote PE

l When the backup NPE restarts or the backup link BFD reports a fault, the master/backup switchover

of NPEs is not performed.

100.3.1.1/24

100.3.1.2/24

100.1.1.1/24

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100.4.1.2/24

4 VRRP Configuration

100.4.1.1/24

100.2.1.1/24

Netengine40e